Evaluation of Ashtech ProMark2 survey system

Abstract

The use of GPS receivers in surveying has become widespread. The limiting factor for many firms remains the relatively high cost of the equipment. This project evaluates the performance of the Ashtech ProMark2 survey system. The Ashtech system comprises two single frequency (L1) receivers and a suite of software for processing, mission planning and file conversions. At the time of purchase the system was approximately 1/6th of the price of a pair of RTK receivers. The Ashtech ProMark2, however the Ashtech system provides post processed results only (no real time capabilities). The objective of the project is to establish what level of accuracy is achievable using the Ashtech ProMark2. Also to determine the effect of changes in baseline length, number of available satellites, dilution of precision and observation duration. Some recommendations as to appropriate observation durations depending on existing conditions are also made.